mISDN: Help to identify the card

With multiple cards is hard to figure out which port caused trouble
int the layer2 routines (e.g. got a timeout).
Now we have the informations in the log output.

Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 60 insertions, 32 deletions

diff --git a/drivers/isdn/mISDN/core.c b/drivers/isdn/mISDN/core.c
index a24530f05db0..c401634c00ec 100644
--- a/drivers/isdn/mISDN/core.c
+++ b/drivers/isdn/mISDN/core.c
@@ -355,6 +355,22 @@ mISDN_unregister_Bprotocol(struct Bprotocol *bp)
 }
 EXPORT_SYMBOL(mISDN_unregister_Bprotocol);
 
+static const char *msg_no_channel = "<no channel>";
+static const char *msg_no_stack = "<no stack>";
+static const char *msg_no_stackdev = "<no stack device>";
+
+const char *mISDNDevName4ch(struct mISDNchannel *ch)
+{
+        if (!ch)
+                return msg_no_channel;
+        if (!ch->st)
+                return msg_no_stack;
+        if (!ch->st->dev)
+                return msg_no_stackdev;
+        return dev_name(&ch->st->dev->dev);
+};
+EXPORT_SYMBOL(mISDNDevName4ch);
+
 static int
 mISDNInit(void)
 {
diff --git a/drivers/isdn/mISDN/layer2.c b/drivers/isdn/mISDN/layer2.c
index b6fbaec1d612..0dc8abca1407 100644
--- a/drivers/isdn/mISDN/layer2.c
+++ b/drivers/isdn/mISDN/layer2.c
@@ -110,8 +110,8 @@ l2m_debug(struct FsmInst *fi, char *fmt, ...)
         vaf.fmt = fmt;
         vaf.va = &va;
 
-        printk(KERN_DEBUG "l2 (sapi %d tei %d): %pV\n",
-               l2->sapi, l2->tei, &vaf);
+        printk(KERN_DEBUG "%s l2 (sapi %d tei %d): %pV\n",
+               mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei, &vaf);
 
         va_end(va);
 }
@@ -154,7 +154,8 @@ l2up(struct layer2 *l2, u_int prim, struct sk_buff *skb)
         mISDN_HEAD_ID(skb) = (l2->ch.nr << 16) | l2->ch.addr;
         err = l2->up->send(l2->up, skb);
         if (err) {
-                printk(KERN_WARNING "%s: err=%d\n", __func__, err);
+                printk(KERN_WARNING "%s: dev %s err=%d\n", __func__,
+                       mISDNDevName4ch(&l2->ch), err);
                 dev_kfree_skb(skb);
         }
 }
@@ -178,7 +179,8 @@ l2up_create(struct layer2 *l2, u_int prim, int len, void *arg)
                 memcpy(skb_put(skb, len), arg, len);
         err = l2->up->send(l2->up, skb);
         if (err) {
-                printk(KERN_WARNING "%s: err=%d\n", __func__, err);
+                printk(KERN_WARNING "%s: dev %s err=%d\n", __func__,
+                       mISDNDevName4ch(&l2->ch), err);
                 dev_kfree_skb(skb);
         }
 }
@@ -189,7 +191,8 @@ l2down_skb(struct layer2 *l2, struct sk_buff *skb) {
 
         ret = l2->ch.recv(l2->ch.peer, skb);
         if (ret && (*debug & DEBUG_L2_RECV))
-                printk(KERN_DEBUG "l2down_skb: ret(%d)\n", ret);
+                printk(KERN_DEBUG "l2down_skb: dev %s ret(%d)\n",
+                       mISDNDevName4ch(&l2->ch), ret);
         return ret;
 }
 
@@ -289,18 +292,18 @@ l2_timeout(struct FsmInst *fi, int event, void *arg)
 
         skb = mI_alloc_skb(0, GFP_ATOMIC);
         if (!skb) {
-                printk(KERN_WARNING "L2(%d,%d) nr:%x timer %s lost - no skb\n",
-                       l2->sapi, l2->tei, l2->ch.nr, event == EV_L2_T200 ?
-                       "T200" : "T203");
+                printk(KERN_WARNING "%s: L2(%d,%d) nr:%x timer %s no skb\n",
+                       mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei,
+                       l2->ch.nr, event == EV_L2_T200 ? "T200" : "T203");
                 return;
         }
         hh = mISDN_HEAD_P(skb);
         hh->prim = event == EV_L2_T200 ? DL_TIMER200_IND : DL_TIMER203_IND;
         hh->id = l2->ch.nr;
         if (*debug & DEBUG_TIMER)
-                printk(KERN_DEBUG "L2(%d,%d) nr:%x timer %s expired\n",
-                       l2->sapi, l2->tei, l2->ch.nr, event == EV_L2_T200 ?
-                       "T200" : "T203");
+                printk(KERN_DEBUG "%s: L2(%d,%d) nr:%x timer %s expired\n",
+                       mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei,
+                       l2->ch.nr, event == EV_L2_T200 ? "T200" : "T203");
         if (l2->ch.st)
                 l2->ch.st->own.recv(&l2->ch.st->own, skb);
 }
@@ -309,8 +312,8 @@ static int
 l2mgr(struct layer2 *l2, u_int prim, void *arg) {
         long c = (long)arg;
 
-        printk(KERN_WARNING
-               "l2mgr: addr:%x prim %x %c\n", l2->id, prim, (char)c);
+        printk(KERN_WARNING "l2mgr: dev %s addr:%x prim %x %c\n",
+               mISDNDevName4ch(&l2->ch), l2->id, prim, (char)c);
         if (test_bit(FLG_LAPD, &l2->flag) &&
             !test_bit(FLG_FIXED_TEI, &l2->flag)) {
                 switch (c) {
@@ -632,8 +635,8 @@ send_uframe(struct layer2 *l2, struct sk_buff *skb, u_char cmd, u_char cr)
         else {
                 skb = mI_alloc_skb(i, GFP_ATOMIC);
                 if (!skb) {
-                        printk(KERN_WARNING "%s: can't alloc skbuff\n",
-                               __func__);
+                        printk(KERN_WARNING "%s: can't alloc skbuff in %s\n",
+                               mISDNDevName4ch(&l2->ch), __func__);
                         return;
                 }
         }
@@ -1118,8 +1121,8 @@ enquiry_cr(struct layer2 *l2, u_char typ, u_char cr, u_char pf)
                 tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0);
         skb = mI_alloc_skb(i, GFP_ATOMIC);
         if (!skb) {
-                printk(KERN_WARNING
-                       "isdnl2 can't alloc sbbuff for enquiry_cr\n");
+                printk(KERN_WARNING "%s: isdnl2 can't alloc sbbuff in %s\n",
+                       mISDNDevName4ch(&l2->ch), __func__);
                 return;
         }
         memcpy(skb_put(skb, i), tmp, i);
@@ -1179,7 +1182,7 @@ invoke_retransmission(struct layer2 *l2, unsigned int nr)
                         else
                                 printk(KERN_WARNING
                                        "%s: windowar[%d] is NULL\n",
-                                       __func__, p1);
+                                       mISDNDevName4ch(&l2->ch), p1);
                         l2->windowar[p1] = NULL;
                 }
                 mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL);
@@ -1490,8 +1493,8 @@ l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
                 p1 = (l2->vs - l2->va) % 8;
         p1 = (p1 + l2->sow) % l2->window;
         if (l2->windowar[p1]) {
-                printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n",
-                       p1);
+                printk(KERN_WARNING "%s: l2 try overwrite ack queue entry %d\n",
+                       mISDNDevName4ch(&l2->ch), p1);
                 dev_kfree_skb(l2->windowar[p1]);
         }
         l2->windowar[p1] = skb;
@@ -1511,12 +1514,14 @@ l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
                 memcpy(skb_push(nskb, i), header, i);
         else {
                 printk(KERN_WARNING
-                       "isdnl2 pull_iqueue skb header(%d/%d) too short\n", i, p1);
+                       "%s: L2 pull_iqueue skb header(%d/%d) too short\n",
+                       mISDNDevName4ch(&l2->ch), i, p1);
                 oskb = nskb;
                 nskb = mI_alloc_skb(oskb->len + i, GFP_ATOMIC);
                 if (!nskb) {
                         dev_kfree_skb(oskb);
-                        printk(KERN_WARNING "%s: no skb mem\n", __func__);
+                        printk(KERN_WARNING "%s: no skb mem in %s\n",
+                               mISDNDevName4ch(&l2->ch), __func__);
                         return;
                 }
                 memcpy(skb_put(nskb, i), header, i);
@@ -1892,7 +1897,8 @@ ph_data_indication(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb)
                 ptei = *datap++;
                 if ((psapi & 1) || !(ptei & 1)) {
                         printk(KERN_WARNING
-                               "l2 D-channel frame wrong EA0/EA1\n");
+                               "%s l2 D-channel frame wrong EA0/EA1\n",
+                               mISDNDevName4ch(&l2->ch));
                         return ret;
                 }
                 psapi >>= 2;
@@ -1901,7 +1907,8 @@ ph_data_indication(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb)
                         /* not our business */
                         if (*debug & DEBUG_L2)
                                 printk(KERN_DEBUG "%s: sapi %d/%d mismatch\n",
-                                       __func__, psapi, l2->sapi);
+                                       mISDNDevName4ch(&l2->ch), psapi,
+                                       l2->sapi);
                         dev_kfree_skb(skb);
                         return 0;
                 }
@@ -1909,7 +1916,7 @@ ph_data_indication(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb)
                         /* not our business */
                         if (*debug & DEBUG_L2)
                                 printk(KERN_DEBUG "%s: tei %d/%d mismatch\n",
-                                       __func__, ptei, l2->tei);
+                                       mISDNDevName4ch(&l2->ch), ptei, l2->tei);
                         dev_kfree_skb(skb);
                         return 0;
                 }
@@ -1950,7 +1957,8 @@ ph_data_indication(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb)
         } else
                 c = 'L';
         if (c) {
-                printk(KERN_WARNING "l2 D-channel frame error %c\n", c);
+                printk(KERN_WARNING "%s:l2 D-channel frame error %c\n",
+                       mISDNDevName4ch(&l2->ch), c);
                 mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *)(long)c);
         }
         return ret;
@@ -1964,15 +1972,16 @@ l2_send(struct mISDNchannel *ch, struct sk_buff *skb)
         int                     ret = -EINVAL;
 
         if (*debug & DEBUG_L2_RECV)
-                printk(KERN_DEBUG "%s: prim(%x) id(%x) sapi(%d) tei(%d)\n",
-                       __func__, hh->prim, hh->id, l2->sapi, l2->tei);
+                printk(KERN_DEBUG "%s: %s prim(%x) id(%x) sapi(%d) tei(%d)\n",
+                       __func__, mISDNDevName4ch(&l2->ch), hh->prim, hh->id,
+                       l2->sapi, l2->tei);
         if (hh->prim == DL_INTERN_MSG) {
                 struct mISDNhead *chh = hh + 1; /* saved copy */
 
                 *hh = *chh;
                 if (*debug & DEBUG_L2_RECV)
                         printk(KERN_DEBUG "%s: prim(%x) id(%x) internal msg\n",
-                               __func__, hh->prim, hh->id);
+                                mISDNDevName4ch(&l2->ch), hh->prim, hh->id);
         }
         switch (hh->prim) {
         case PH_DATA_IND:
@@ -2053,7 +2062,8 @@ tei_l2(struct layer2 *l2, u_int cmd, u_long arg)
         int             ret = -EINVAL;
 
         if (*debug & DEBUG_L2_TEI)
-                printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd);
+                printk(KERN_DEBUG "%s: cmd(%x) in %s\n",
+                       mISDNDevName4ch(&l2->ch), cmd, __func__);
         switch (cmd) {
         case (MDL_ASSIGN_REQ):
                 ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ASSIGN, (void *)arg);
@@ -2066,7 +2076,8 @@ tei_l2(struct layer2 *l2, u_int cmd, u_long arg)
                 break;
         case (MDL_ERROR_RSP):
                 /* ETS 300-125 5.3.2.1 Test: TC13010 */
-                printk(KERN_NOTICE "MDL_ERROR|REQ (tei_l2)\n");
+                printk(KERN_NOTICE "%s: MDL_ERROR|REQ (tei_l2)\n",
+                       mISDNDevName4ch(&l2->ch));
                 ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL);
                 break;
         }
@@ -2098,7 +2109,8 @@ l2_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
         u_int                   info;
 
         if (*debug & DEBUG_L2_CTRL)
-                printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd);
+                printk(KERN_DEBUG "%s: %s cmd(%x)\n",
+                       mISDNDevName4ch(ch), __func__, cmd);
 
         switch (cmd) {
         case OPEN_CHANNEL: